Learn here how to count from 21 to 32. If you know, for example, 60, you can also count from 70 to 79 because it all works the same up to 100 (for example, 67 is "sixty-seven")

One   Two   Three   Four   Five   Six   Seven   Eight   Nine   Ten   Eleven   Twelve   Thirteen   Fourteen   Sixteen   Seventeen   Eighteen   Nineteen   Twenty
twenty-one
twenty-two
twenty-three
twenty-four
twenty-five
twenty-six
twenty-seven
twenty-eight
twenty-nine
thirty